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<?php if (!defined('BASEPATH')) exit('No direct script access allowed');
/**
* Code Igniter
*
* An open source application development framework for PHP 4.3.2 or newer
*
* @package CodeIgniter
* @author Rick Ellis
* @copyright Copyright (c) 2006, pMachine, Inc.
* @license http://www.codeignitor.com/user_guide/license.html
* @link http://www.codeigniter.com
* @since Version 1.0
* @filesource
*/
// ------------------------------------------------------------------------
/**
* Code Igniter Security Helpers
*
* @package CodeIgniter
* @subpackage Helpers
* @category Helpers
* @author Rick Ellis
* @link http://www.codeigniter.com/user_guide/helpers/security_helper.html
*/
// ------------------------------------------------------------------------
/**
* XSS Filtering
*
* @access public
* @parm string
* @parm string the character set of your data
* @return string
*/
function xss_clean($str, $charset = 'ISO-8859-1')
{
$obj =& get_instance();
return $obj->input->xss_clean($str, $charset);
}
// --------------------------------------------------------------------
/**
* Hash encode a string
*
* @access public
* @param string
* @return string
*/
function dohash($str, $type = 'sha1')
{
if ($type == 'sha1')
{
if ( ! function_exists('sha1'))
{
if ( ! function_exists('mhash'))
{
require_once(BASEPATH.'libraries/Sha1'.EXT);
$SH = new CI_SHA;
return $SH->generate($str);
}
else
{
return bin2hex(mhash(MHASH_SHA1, $str));
}
}
else
{
return sha1($str);
}
}
else
{
return md5($str);
}
}
// ------------------------------------------------------------------------
/**
* Strip Image Tags
*
* @access public
* @parm string
* @return string
*/
function strip_image_tags($str)
{
$str = preg_replace("#<img\s+.*?src\s*=\s*[\"'](.+?)[\"'].*?\>#", "\\1", $str);
$str = preg_replace("#<img\s+.*?src\s*=\s*(.+?).*?\>#", "\\1", $str);
return $str;
}
// ------------------------------------------------------------------------
/**
* Convert PHP tags to entities
*
* @access public
* @parm string
* @return string
*/
function encode_php_tags($str)
{
return str_replace(array('<?php', '<?PHP', '<?', '?>'), array('<?php', '<?PHP', '<?', '?>'), $str);
}
?>
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